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Earth's oceans once turned green—and they could change againNearly three-fourths of Earth is covered by oceans, making the planet look like a pale blue dot from space. But Japanese researchers have made a compelling case that Earth's oceans were once green ...
Instead of reflecting blue light, they may have been glowing green due to iron-rich waters. During this time, the oceans contained large amounts of iron hydroxide.
Nearly three fourths of Earth is covered by oceans, making the planet look like a pale blue dot from space. But Japanese researchers have made a compelling case that Earth's oceans were once green ...
Blue-green algae, also called cyanobacteria, were one of the earliest life forms on Earth and contributed heavily to the oxygenation of the planet.
Although the Earth’s been decidedly blue for 600 million years, rising populations of phytoplankton caused by rising temperatures are once again causing the world’s oceans to turn green.
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